GB/T 30789.5-2015 "Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 5: Assessment of degree of flaking" is applicable to the grading of flaking defects in coatings after aging tests. The method involves simulating natural or accelerated aging environments using aging test chambers, observing the area, morphology, and distribution of coating flaking with magnifiers or stereomicroscopes, and assessing the results against standard grading rules. It specifies requirements for observation angles, magnification levels, and sampling areas, providing a standardized approach for evaluating the protective performance of coatings against aging.
| Status | Active | ||
|---|---|---|---|
| CCS | G50 | ICS | 87.040 |
| Release Date | 2015-07-03 00:00:00 | Implementation Date | 2016-02-01 00:00:00 |
